Cold-chisel



w. T, ROUTH."

COLD CHISEL.

I N FILED JUNE APPLICAT 9, ms. 3 0 24 1 Patented Aug. 17, 1920.

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UNITED STATES PATENT OFFICE.

WILLIAM T. ROUTE, OF HELENA, GEORGIA.

COLD-CHISEL.

Specification of Letters Patent. Patented 8,11 .17, 1920.

Application filed June 9, 1919. Serial No. 302,642.

b all whom it may concern:

Be it known that 1, WILLIAM T. RoU'rH, a citizen of the United States, residing at Helena, in the county Telfair and State of oieorgia, have invented certain new and useful Improvements in Cold-Chisels; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters and figures of reference marked thereon, which form a part of this specification.

This invention'relates to cold chisels used to cut or chip metal by striking the implement repeated blows with a hammer in the customary manner.

The object of this invention is the production of a cold chisel having special construction whereby while it is fully capable of performing all the functions of such a tool, it may be very conveniently and effectively applied to certain particular operations as herein illustrated and explained.

The peculiar construction of this invention is set out in the accompanying drawings,of which Figure 1 represents a side view of the body or shank and a fiatwise View of the blade and ridged portion. Fig.- 2 is a side view of the body and anedge view of the blade. Fig. 3 is a cross-section of the blade on broken line 33 of Fig. 1. Fig. 4 is a vertical section of a portion of the blade on vertical broken line 4-4 of Fig. 1. Fig. 5 is an explanatory figure introduced to aid in explanation of one of "the additional or special purposes to which this invention may be devoted. The invention is shown holding the head of a bolt.

Throughout the description and drawings the same letter is employed to refer to the same part.

Considering the drawings, this invention as ordinarily constructed has a body, shank, or handle portion A, and a continuation usually flattened and termed for the purpose of this description, blade B. The lower portion of the blade is providedwith a number, customarily three, vertically arridges.

In explaining the operation of this invention, it may be stated that it can be used for cutting plates or bars, or for chipping castings, or for any of the numerous manufacturing acts for which cold chisels are required. In addition thereto it is particularly convenient and useful for certain special employment. For example, considering Fig. 5 the letter 1 refers to a beam of wood through which there has been passed a bolt having a head j. Let it be assumed that it is desired to remove the bolt and to that end an attempt it made to unscrew the nut, not shown. It is found that the wrench simply turns the boltaround .in its place.

Now, if this invention be driven in slantwise under the head j, the cutting ridges will bitethe wood and the head of the bolt as well, and the bolt will be firmly held against turning.

Having now described this invention, and explained .themode of its operation, What I claim is 1. A cold chisel, comprising a body, and a blade, the lower portion of the blade having cutting edge, and a plurality of wedge-shaped cutting ridges spaced apartand rising from the said cutting edge, on both sides of the said edge.

2. A cold chisel, comprising a body, and a blade, the lower portion of the blade having a cutting edge, and wedge-shaped cutting ridges spaced apart and arising at the ends of the said cutting edge and at an intermediate point of said edge, and on both sides of the said. edge.

In testimony whereof, I afiix my signature.

7 WILLIAM T. ROUTH. 

